Of course, a wheel's size is more than just its width. Inner measurement (A) is the hub face to the inner wheel well. Knowing this measurement will help you make sure your tire doesn't rub on the ...

If you have 1-ton axles, rim size may be a non-issue, since 15-inch rims will not fit over the brakes without heavily grinding the calipers or swapping in smaller brakes.

19. Another thing to consider when trying to find the current rim size is to see if it’s marked, and ours was—clearly stamped 17x8.0 on the fronts and 17x9.0 on the rears.

Width, height and size Perhaps the most commonly discussed piece of data about a tire is a number in the format "XXX/XXRXX," which describes a tire's size and shape in a somewhat arcane way.